Datasheet > RT8886A

RT8886A

更新时间： 2024-01-23 14:24:47

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
45页	657K
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RT8886A 技术参数

Status：	Active	VID Table Support：	VR12.5
Number of Phases：	2	Vcc (typ) (V)：	5
Vin (min) (V)：	5	Vin (max) (V)：	25
Accuracy (Vout>=1V) (+/- %)：	0.5	Freq (typ) (kHz)：	600
Built-in DAC Generator：	Yes	Number of MOSFET Drivers：	2
Features：	Adjustable Frequency;Built-in Bootstrap Switch;DCR Current Sense;Diode Emulation Mode;Droop Control;Enable Input;Fast Transient Response;G-NAVP Control;OCP;OVP;Power Good;Stable with Ceramic Capacitor;UVP	Package Type：	WQFN4x4-32

RT8886A 数据手册

RT8886A

2-Phase Controller with Dual Integrated Drivers for VR12.5

and VR12.6 Mobile CPU Core Power Supply

General Description

The RT8886A is a two phase CPU power controller with

dual integrated drivers for VR12.5 and VR12.6 compliant.

The RT8886Aadopts theG-NAVP^TM(GreenNativeAVP)

which is Richtek's proprietary topology derived from finite

DC gain of EAamplifier with current mode control, making

it easy to set the droop to meet all Intel CPU requirements

of AVP (Adaptive Voltage Positioning). Based on the G-

NAVP^TMtopology, the RT8886A also features a quick

response mechanism for optimized AVP performance

during load transient. The RT8886A supports mode

transition function with various operating states. A Serial

VID (SVID) interface is built in the RT8886A to

communicate with Intel VR12.5 and VR12.6 compliant

CPU. The RT8886A supports VID on-the-fly function with

different slew rates. By utilizing the G-NAVP^TMtopology,

the operating frequency of the RT8886A varies with VID,

load current and input voltage to further enhance the

efficiency even in CCM. Besides the G-NAVP^TM, the

CCRCOT (Constant Current Ripple Constant On Time)

technology provides superior output voltage ripple over

the entire input/output range. The built-in high accuracy

DAC converts the SVIDcode ranging from 0.5V to 3.04V

with 10mV per step. The RT8886A integrates a high

accuracy ADC for platform setting functions, such as no-

load offset and over-current protection level. The RT8886A

provides VR ready output signals. It also features complete

fault protection functions including Over-Voltage (OV),

Under-Voltage (UV),Negative-Voltage (NV), Over-Current

(OC) and Under-Voltage Lockout (UVLO). The RT8886A

is available in the WQFN-32L4x4 small foot print package.

Features

 Intel VR12.5 and VR12.6 Serial VID Interface

Compatible Power Management States

 2/1 Phase PWM Controller with Dual Integrated

Drivers

 G-NAVP^TMTopology

 0.5% DAC Accuracy

 Differential Remote Voltage Sensing

 Built-in ADC for Platform Programming

 Accurate Current Balance

 System Thermal Compensated AVP

 Diode Emulation Mode at Light Load Condition for

Single Phase

 Fast transient Response

 VR Ready Indicator

 Thermal Throttling

 Current Monitor Output

 OVP, UVP, OCP, UVLO

 Programmable DVID Slew Rate

 DVID Enhancement

 Small 32-Lead WQFN Package

 RoHS Compliant and Halogen Free

Simplified Application Circuit

RT8886A

VR_RDY

To PCH

PHASE1

MOSFET

CORE

VR_HOT

VCLK

To CPU

VDIO

PHASE2

ALERT

is a registered trademark of Richtek Technology Corporation.

DS8886A-00 November 2013

www.richtek.com

12 3 4 5 6 7...45

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